252 lines
6.8 KiB
Python
252 lines
6.8 KiB
Python
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#
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# psuutil.py
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# Platform-specific PSU status interface for SONiC
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#
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import logging
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import os.path
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try:
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from sonic_psu.psu_base import PsuBase
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except ImportError as e:
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raise ImportError(str(e) + "- required module not found")
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class PsuUtil(PsuBase):
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"""Platform-specific PSUutil class"""
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HWMON_PATH = '/sys/class/hwmon/hwmon2/'
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PSU1_PREFIX = 'power39_'
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PSU2_PREFIX = 'power49_'
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MAX_PSUS = 2
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def __init__(self):
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PsuBase.__init__(self)
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# Get sysfs attribute
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def get_attr_value(self, attr_path):
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retval = 'ERR'
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if (not os.path.isfile(attr_path)):
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return retval
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try:
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with open(attr_path, 'r') as fd:
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retval = fd.read()
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except Exception:
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logging.error("Unable to open ", attr_path, " file !")
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retval = retval.rstrip('\r\n')
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return retval
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def get_attr_filename(self, index, attr):
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if (index == 1):
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attr_file = self.PSU1_PREFIX + attr
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elif (index == 2):
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attr_file = self.PSU2_PREFIX + attr
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else:
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logging.error("Invalid PSU number:", index)
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return ''
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return attr_file
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def get_num_psus(self):
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"""
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Retrieves the number of PSUs available on the device
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:return: An integer, the number of PSUs available on the device
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"""
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return self.MAX_PSUS
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def get_psu_status(self, index):
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"""
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Retrieves the oprational status of power supply unit (PSU) defined
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by index <index>
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:param index: An integer, index of the PSU of which to query status
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:return: Boolean, True if PSU is operating properly, False if PSU is\
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faulty
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"""
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status = False
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attr_filename = self.get_attr_filename(index, 'input')
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if attr_filename == '':
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return status
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attr_path = self.HWMON_PATH + attr_filename
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attr_value = self.get_attr_value(attr_path)
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if (attr_value != 'ERR'):
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attr_value = float(attr_value)
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# Check PSU status
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if (attr_value != 0.0):
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status = True
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return status
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def get_psu_presence(self, index):
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"""
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Retrieves the presence status of power supply unit (PSU) defined
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by index <index>
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:param index: An integer, index of the PSU of which to query status
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:return: Boolean, True if PSU is plugged, False if not
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"""
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status = False
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attr_filename = self.get_attr_filename(index, 'present')
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if attr_filename == '':
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return status
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attr_path = self.HWMON_PATH + attr_filename
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attr_value = self.get_attr_value(attr_path)
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if (attr_value != 'ERR'):
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attr_value = int(attr_value, 16)
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# Check PSU status
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if (attr_value == 1):
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status = True
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return status
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def get_powergood_status(self, index):
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status = False
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attr_filename = self.get_attr_filename(index, 'input')
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if attr_filename == '':
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return status
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attr_path = self.HWMON_PATH + attr_filename
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attr_value = self.get_attr_value(attr_path)
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if (attr_value != 'ERR'):
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attr_value = float(attr_value)
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# Check PSU status
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if (attr_value != 0.0):
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status = True
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return status
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def get_model(self, index):
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attr_filename = self.get_attr_filename(index, 'model')
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if attr_filename == '':
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return None
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attr_path = self.HWMON_PATH + attr_filename
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attr_value = self.get_attr_value(attr_path)
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if (attr_value != 'ERR'):
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return attr_value.rstrip()
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def get_mfr_id(self, index):
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attr_filename = self.get_attr_filename(index, 'mfrid')
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if attr_filename == '':
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return None
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attr_path = self.HWMON_PATH + attr_filename
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attr_value = self.get_attr_value(attr_path)
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if (attr_value != 'ERR'):
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return attr_value.rstrip()
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def get_serial(self, index):
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attr_filename = self.get_attr_filename(index, 'sn')
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if attr_filename == '':
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return None
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attr_path = self.HWMON_PATH + attr_filename
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attr_value = self.get_attr_value(attr_path)
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if (attr_value != 'ERR'):
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return attr_value.rstrip()
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def get_direction(self, index):
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if (index == 1):
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direction_file = 'fan37_direction'
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elif (index == 2):
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direction_file = 'fan47_direction'
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else:
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logging.error("Invalid PSU number:", index)
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return None
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direction = self.get_attr_value(self.HWMON_PATH + direction_file)
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direction = direction.rstrip()
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"""
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1: FB 2: BF
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Since the fan is at rear of the switch, FB means Exhaust; BF means Intake
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"""
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if direction == '2':
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return "INTAKE"
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else:
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return "EXHAUST"
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def get_output_voltage(self, index):
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if (index == 1):
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attr_file = 'in44_input'
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elif (index == 2):
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attr_file = 'in54_input'
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else:
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logging.error("Invalid PSU number:", index)
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return 0.0
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voltage = self.get_attr_value(self.HWMON_PATH + attr_file)
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voltage = voltage.rstrip()
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if (voltage != 'ERR'):
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voltage, dummy = voltage.split('.', 1)
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else:
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return 0.0
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return float(voltage)/1000
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def get_output_current(self, index):
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if (index == 1):
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attr_file = 'curr36_input'
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elif (index == 2):
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attr_file = 'curr46_input'
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else:
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logging.error("Invalid PSU number:", index)
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return 0.0
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current = self.get_attr_value(self.HWMON_PATH + attr_file)
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current = current.rstrip()
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if (current != 'ERR'):
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current, dummy = current.split('.',1)
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else:
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return 0.0
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return float(current)/1000
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def get_output_power(self, index):
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attr_filename = self.get_attr_filename(index, 'input')
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if attr_filename == '':
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return 0.0
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attr_path = self.HWMON_PATH + attr_filename
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attr_value = self.get_attr_value(attr_path)
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if (attr_value != 'ERR'):
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attr_value = float(attr_value)
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else:
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return 0.0
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return float(attr_value/1000)
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def get_fan_rpm(self, index, fan_idx):
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if (index == 1):
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rpm_file = 'fan37_input'
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elif (index == 2):
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rpm_file = 'fan47_input'
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else:
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logging.error("Invalid PSU number:", index)
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return 0
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rpm = self.get_attr_value(self.HWMON_PATH + rpm_file)
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rpm = rpm.rstrip()
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if (rpm != 'ERR'):
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rpm = float(rpm)
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else:
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return 0
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return int(rpm)
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